Yongnian in context: Street-network sprawl trends

Yongnian in context

2.433.64.2<19751976–19901991–20052006–2020SNDi of street additions
2.433.64.2<19751976–19901991–20052006–2020SNDi of entire street network
YongnianHebei (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Yongnian plotted against Hebei and China. The SNDi of new construction in Yongnian peaked in 1976-1990, compared to Hebei which followed a zig-zag trend with an overall increase and China which followed a zig-zag trend with an overall increase. Most recently, Yongnian's incremental SNDi fell from 2.9 to 2.6 between 1991-2005 and 2006-2020. In terms of the aggregate network, Yongnian ranked 45th out of 120 cities in Hebei and 740th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
2.6
Rank in China
593rd of 1843
Rank in Hebei
31st of 120

Entire Network (Aggregate)

SNDi value
2.69
Rank in China
740th of 1843
Rank in Hebei
45th of 120

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

246<19751976–19901991–20052006–2020SNDi of street additions
246<19751976–19901991–20052006–2020SNDi of entire street network
YongnianAbu TigDengfeng

In new street additions, Yongnian built increasingly disconnected streets from 1975 through 1976-1990, then improved, while Abu Tig built increasingly connected streets from 1975 through 1976-1990, then shifted to more disconnected patterns and Dengfeng built increasingly disconnected streets over time. For the full network, Yongnian grew more disconnected from 1975 through 1991-2005, then improved, while Abu Tig became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards and Dengfeng became progressively more disconnected. Yongnian and Dengfeng have been converging in their street-network character since 1975.